Manage Identities

Use identities to add users who can read the messages sent as Restricted Permission Message (RPMSG) files.

RPMSG files deliver emails using the Rights-Managed Email Object Protocol. This protocol controls email access and usage permissions. The content of an RPMSG email is stored as an encrypted file attachment to the email. You can use the Rights-Managed Email Object Protocol to specify restrictions, such as forwarding, printing, copying, and providing access to only specific users. As the rights management information is encoded in the e-mail, these restrictions are independent of the device where the e-mail is received.

You can view an RPMSG file using Microsoft Outlook, Outlook Web App (OWA), and Azure Information Protection Viewer.

Data in the RPMSG file is stored in a Compound File Binary format. This format allows storing multiple complex content objects in a single binary file. When an application like Microsoft Outlook detects an RPMSG file in the email, the message is decoded following the rules specified in the RPMSG file. The RPMSG files are transferred over email or the Internet using the application/x-microsoft-rpmsg-message Multipurpose Internet Mail Extensions (MIME) type.